Played about 40% of the game so far and so far it's been a wonderful. Can easily see myself spend tens of hours more on just swinging around Manhattan. Insomianc has created a very detailed and immersive NYC to play around in.
If you like Spiderman even remotely, get this game!

I think both teams have to build new assets. I also think UE4 provides better results faster. Black Mesa guys have done massive engine overhauls to get more detail out of Source. I think they could even have progressed faster with UE4. Oh, and level streaming is one of the major advantages that UE4 has compared to Source.
I'm also a sucker for nice visuals, so as long as the gameplay is solid, Alyph will be secondary to me. If it comes out way before Borealis, sure, I'll take it for a spin.

Played about half of the first one so far with my friend and it has been a blast. The gameplay is really solid. So nice to traverse on the rooftops and take zombie smashing breaks on the way to the next quest.
The story and characters are one of the weak points, which tells me that the developers really know where to focus on this second iteration.
I believe this game will be the one to watch next year.

Also finished it just a couple days ago and I'd say it's one of the best games I've played in recent years. Story, art, level design and gameplay are definitely top notch. I do agree with what [HP] said about enemy variety, could have been a tad more.
Got an impression that there's plenty more of this world to explore, so bring on the sequel with everything fine tuned to 2.0. Sony, I'll be waiting.

Something completely new...The zombie part somehow looks....very similar to Rebellion's The Strange Brigade. Astonishing creativity.
Fell of the COD bandwagon a long time ago and highly doubt I'll touch one in the next decade.

Probably played about 20hrs and getting just more and more obsessed with this game.
Playing on Give Me A Challenge which really does what it says. Combat is so satisfying, but can't say I'm relax after a session which results in an increased heart rate.